Sharpening implements



Se t. 11, 1962 c. B. MOZDY SHARPENING IMPLEMENTS Filed Oct. 5, 1960 INVENTOR CHARLES B. MOZDY' United States Patent Office 3,053,019 Patented Sept. 11, 1962 3,653,1E19 SENHIG IMPLEMENTS Charles E. Moldy, 4627 Iowa St, San Diego 16, Calif. Filed Oct. 5, 1969, Ser. No. 60,718 Claims. (Cl. 51151) The present invention relates to improvements in abrasive instruments, and more particularly to cutting devices, sharpeners and in particular for scissors sharpeners. I

One object of the invention is to provide a sharpening implement for various cutters such as scissors, knives and the like which is provided with a removable abrasive element to facilitate removal and replacement when the abrasive element has become worn.

Another object is to provide a sharpening implement for scissors and the like in which a reciprocating guide element is supported by the stationary abrasive surface to hold the cutting implement in a correct position when the same is presented to the abrasive surface and reciprocated thereover.

Another object is to provide a sharpening implement having a stationary base, one end of which is bent and curled to form a rolled terminus and provided with a slot for receiving one end of a flexible abrasive strip so that the same can be wrapped around the curled portion of said terminus to extend over the base surface in mutual contactual engagement therewith and the end of the abrasive element frictionally held in place.

Another object is to provide a sharpening implement in which the base member is provided with a transverse slot for receiving the other reduced end of the flexible abrasive strip which is bent upon itself to extend along the underside of said base member where it is engaged by a friction catch secured to the base to firmly hold the flexible abrasive strip in place.

Another object is to provide a latch element pivotally mounted to swing on the underside of the base and beneath said slot so that the free end will frictionally and rigidly secure the flexible abrasive strip in place.

Another object is to provide a sharpening element adapted to be used for manually sharpening various cutters which is formed of a base of sheet metal having downwardly extending flanges along the longitudinal edges with one of the flanges bent inwardly to form with the base surface an angle of approximately 70, this provides clearance for the blade holder and the flanges reinforce the structure throughout its length and well as spacing the abrasive surface above a support on which the implement is placed.

Other objects and advantages of the invention will become apparent during the course of the following description of the accompanying drawing wherein:

FIGURE 1 is a top elevational view showing the sharpening implement and illustrating the manner in which a scissors or other cutting implement is held by the blade holder so that it may be properly positioned with respect to the abrasive surface of the sharpener.

FIGURE 2 is a longitudinal cross-sectional view taken on line 22 of FIGURE 1 and looking in the direction of the arrows to illustrate the various structural parts of the latch member for retaining the flexible abrasive strip in position.

FIGURE 3 is a fragmentary bottom elevational view illustrating the manner in which the reduced portion of the flexible abrasive strip is secured in place.

FIGURE 4 is a longitudinal cross-sectional View taken on line 44 of FIGURE 1 and looking in the direction of the arrows to illustrate the bent end portion of the base member which is curved and slotted for receiving the other end of the flexible abrasive strip, and

FIGURE 5 is a transverse cross-sectional view taken on line 5-5 of FIGURE 1 and looking in the direction of the arrows to illustrate the curled portion at the end of the base plate and showing the slot in dotted lines for receiving the reduced end tab portion of the flexible abrasive strip.

In the drawing, and more in detail, there is shown a sharpening implement generally including a base designated 5 and a blade holder generally designated 6. The base 5 is formed of an elongated sheet of metal or other rigid material having longitudinally extending flanges 8 and 9 along the sides thereof and an end flange 10. The flange 8 extends at an angle of with respect to the surface 12 and the base plate 7, while the flange 9 extends at a lesser angle of approximately 70 with respect to the surface 12, of the base element 7.

The end of the base plate 7 opposite the flange 10 is bent in the form of a curled portion 13 having a trans-' verse slot 14 therein with respect to the longitudinal line of the base plate 7.

The flexible abrasive strip 15 is of a width substantially equal to the width of the base plate 7 to extend to the longitudinal edges thereof and said strip is provided with reduced end portions 16 (FIG. 4) and a reduced opposite end portion 17 (FIG. 3). The reduced portions 16 and 17 form tabs, one of which can be inserted through the slot 14 from the underside of the base so that the flexible abrasive element can be wrapped around the curved portion of the rolled end 13 as at 18 to frictionally grip the tab end extending through said opening. The flexible abrasive strip is then placed along the upper surface of the base 7 which is smooth and flat and the tab end 17 is inserted in a transverse slot 20 in the base plate 7 so that the reduced tab end portion 17 may be folded along the under surface of said base plate 7.

Pivotally attached to the underside of the base plate 7 is a latch member 21 having a longitudinal flange 22 along one edge thereof and said latch is pivoted to the base member 7 by means of a rivet 23, the opposite ends of which are enlarged to provide head portions to retain the latch in place but permit the same to be pivoted about the axis of the rivet. The swing axis of the latch 21 is offset laterally from the longitudinal center of the base plate and the flange 22 is of a depth smaller than the depth of the flanges 8 and 9 so that no portion of the latch and rivet 23 will engage a surface upon which the sharpening device is supported. When the latch 21 which is formed of a flat piece of metal having a relatively large surface is swung to the position shown in FIGURE 3 the tab end 17 of the flexible abrasive strip 15 is frictionally gripped and clamped between the under surface of the latch 21 and the under surface of the base plate 7. Thus, the flexible abrasive sheet 15 is securely held in place.

The abrasive sheet 15 is of the flexible type resembling garnet paper produced by the Midwest Abrasive Company, Detroit, Michigan and different grades having silicon carbide grain particles adhesively secured to the paper backing similar to ordinary sandpaper.

The blade holder 6 includes a U-shaped bracket generally designated 25 secured to one end of the base plate along the center line thereof. The U-shaped bracket 25 is formed of spaced apart leg portions 26 connected at one end as at .28 and pivoted to the base plate 7 by means of a rivet 29. Mounted between the upper ends of the U-shaped bracket 25 is a guide block 30 having a pair of oppositely arranged trunnion pins 31 which are received in corresponding openings in the upper ends of the U-shaped bracket legs 26. The guide 30 is provided with a longitudnial bore 32 for slidably receiving a guide rod 33 one end of which is flattened as at 34 to accommodate a blade holder 35. The blade holder 35 is provided at one end with a flange 36 and a rivet 37 passes through the flattened end 34 of the guide rod 33 and through a corresponding opening in the flange 36. Mounted in the blade holder 35 adjacent one end is a pair of pins 38 and 39 which are spaced different distances from the edge of the blade holder and to provide a stop for the edge of a pair 'of scissors S as shown in FIGURE 1. The cutting edge C projects beyond the edge of the blade holder 35 so that the blade holder 35 can be turned through an angle of 90 from that shown in FIGURE 1, and the guide rod 33 similarly turned about its longitudinal axis to correctly position the cutting edge C of the scissors S on the abrasive surface 15 and in the proper angular relation to sharpen the scissors cutting edge C properly.

The scissors blade is held in place by a clamping plate 40 by means of a clamping screw 41 and clamping wing nut 42. When in operation, the blade C of the scissors S is presented to the abrasive surface 15 at an angle of approximately 20 from a perpendicular plane normal to the base plate 7.

It is to be understood that the form of the invention herewith shown and described is to be taken as a preferred embodiment thereof, and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

What I claim is:

1. In a sharpening device, a base having a downwardly extending rolled edge at one end thereof and a transverse slot at the other end, said rolled edge forming a tubular portion having a longitudinal slot, a flexible abrasive strip extending over said base with one end received in the slot in said tubular portion and wrapped around said rolled edge and the other end extending downwardly through said transverse slot, a latch member on the underside of said base arranged to frictionally engage said downwardly extending end received in said transverse slot and anchor the same against removal.

2. In a sharpening device, an elongated base having downwardly extending flanges on the longitudinal edges thereof, one end of said base being provided with a roiled edge providing a tubular portion having a slot extending longitudinally thereof and the other end of said base having a transverse slot, a flexible abrasive strip extending along said base with one end received in said longitudinal slot and held by said rolled edge and the other end extending downwardly through said transverse slot, a retaining member on the underside of said base movable into and out of position with respect to the downwardly extending end of said strip to removably and frictionally hold said strip in position, and a guide member secured to said base for guiding a scissors edge with respect to said abrasive strip.

3. In a sharpening device, a base formed of metal and having downwardly turned flanges on opposite sides thereof, a rolled edge forming a tubular portion having a longitudinally extending slot and a transverse slot extending through the other edge of said base, a flexible abrasive strip supported on said base with one end received in said longitudinal slot and wound around said rolled edge to engage said one end and the other end of said strip extending downwardly through said transverse slot and bent upon itself, and a retaining member movably mounted on the underside of said base arranged to be moved into engagement with said return bent end to frictionally engage the same and clamp the strip in place.

4. In a sharpening device, an elongated base having downwardly extending flanges on opposite sides thereof and a downwardly rolled edge provided with an opening at one end, an abrasive strip having one end received in said opening and wound around said rolled edge to extend across the top of said base, the other end of said strip being passed through a transverse slot in said base and bent upon itself, a retaining member pivoted to the underside of said base and engageable with said return bent end to securely hold said abrasive strip on said base plate, a guide rod mounted on said base, a blade clamp on the guide rod to securely hold the blade of a cutting implement in proper relation with respect to said abrasive sheet.

5. In a sharpening device, an elongated base having flanges along the longitudinal edges thereof, one of the end edges of said base being bent to form a rolled cylindrical portion having an opening formed therein, a strip of flexible abrasive material having one end inserted in said opening with the strip wound over said cylindrical portion to frictionally grip the end extending through said opening, said base being provided at its opposite end with a transverse slot for receiving the other end of said strip, a pivoted clamping member engageable with said last named end to hold said strip in place, an upstanding support at one end of said base having a guideway, a guide rod slidably mounted in said guideway and a blade clamp secured to one end of said guide rod to receive the blade of a cutting implement and hold the same in proper relation while being manually moved over said abrasive strip surface.

References Cited in the file of this patent UNITED STATES PATENTS 

